This example demonstrate how to create an excel document using Apache POI library. In this example we create a simple document containing two sheets which have a value on their first cell.

package org.kodejava.example.poi;

import org.apache.poi.hssf.usermodel.*;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class CreateExcelDemo {
    public static void main(String[] args) {
        // Creating an instance of HSSFWorkbook.
        HSSFWorkbook workbook = new HSSFWorkbook();

        // Create two sheets in the excel document and name it First Sheet and
        // Second Sheet.
        HSSFSheet firstSheet = workbook.createSheet("FIRST SHEET");
        HSSFSheet secondSheet = workbook.createSheet("SECOND SHEET");

        // Manipulate the firs sheet by creating an HSSFRow which represent a
        // single row in excel sheet, the first row started from 0 index. After
        // the row is created we create a HSSFCell in this first cell of the row
        // and set the cell value with an instance of HSSFRichTextString
        // containing the words FIRST SHEET.
        HSSFRow rowA = firstSheet.createRow(0);
        HSSFCell cellA = rowA.createCell(0);
        cellA.setCellValue(new HSSFRichTextString("FIRST SHEET"));

        HSSFRow rowB = secondSheet.createRow(0);
        HSSFCell cellB = rowB.createCell(0);
        cellB.setCellValue(new HSSFRichTextString("SECOND SHEET"));

        // To write out the workbook into a file we need to create an output
        // stream where the workbook content will be written to.
        try (FileOutputStream fos = 
                 new FileOutputStream(new File("CreateExcelDemo.xls"))) {
            workbook.write(fos);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Maven Dependencies

<!-- https://search.maven.org/remotecontent?filepath=org/apache/poi/poi/4.1.0/poi-4.1.0.jar -->
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.0</version>
</dependency>

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Wayan Saryada

Founder at Kode Java Org

I am a programmer, a runner, a recreational diver, currently live in the island of Bali, Indonesia. Mostly programming in Java, Spring Framework, Hibernate / JPA. If these posts help, you can support me, buy me a cup of coffee or tea. Thank you 🥳

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